On Thursday, Ahmed al-Asiri claimed that the coalition seeks to transfer humanitarian assistance to Yemen from the Red Sea port city of Mokha.
The United Nations has already rejected a call by Saudi Arabia and its allies to supervise Hudaydah, where tens of refugees were killed last week in an aerial attack blamed on Riyadh.
More than 40 people lost their lives and dozens of others were injured in an apparent Saudi airstrike that hit a boat carrying Somali refugees near Bab al-Mandeb Strait on Friday.
Riyadh and its allies have denied being behind the air raid despite witness accounts citing an Apache helicopter – which is only used by Saudi Arabia in the war on Yemen – to have attacked the vessel.
The UN and Russia have warned against the humanitarian ramifications of any Saudi-led attack on the port city.